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3 years ago

Number one and number two

Mathematics

1 answer:

Amanda [17]3 years ago

4 0

1. sum of exterior angles = 360

so one interior angles = 180 - (360/30) = 180 - 12 = 168 degrees
sum of all the interior angles = 168*30 = 5040
B

2. H

the sum of exterior angles of all polygons is 360 degrres

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A political campaign wants to estimate the number of adult residents who voted in the last city election. Answer the following.

Svetradugi [14.3K]

Using sampling concepts, it is found that:

a) The best method is: 25 adult residents are randomly selected from the city;

b) The estimate is that 11,536 adults voted in the election.

<h3>What is sampling?</h3>

It is a common statistics practice, when we want to study something from a population, we find a sample of this population, which is a group containing elements of a population. A sample has to be representative of the population, that is, it has to involve all segments of the population.

In this problem, the sample will be representative if all adults, no matter if senior or not, homeowners or not are represented, hence the best method is:

25 adult residents are randomly selected from the city;

The estimate of the number of adults that voted is:

14/25 x 20,600 = 11,536.

More can be learned about sampling concepts at brainly.com/question/25122507

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1 year ago

Rita is starting a running program. the table shows the total number of miles she runs in different weeks. what is the equation

Stolb23 [73]

Based on the table, the equation of the line of best fit to the nearest thousandths is equal to y = 1.671x + 4.699.

<h3>How to determine the equation of the line of best fit?</h3>

Mathematically, the equation of the line of best fit is calculated by using this formula:

y = mx + c

<u>Where:</u>

m is the slope.

c is the intercept.

Based on the table, the slope and intercept to the nearest thousandths are equal to 1.671 and 4.699 respectively.

Therefore, the equation of the line of best fit is equal to y = 1.671x + 4.699.

Read more on line of best fit here: brainly.com/question/4674926

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7 0

2 years ago

Read 2 more answers

3 1/4 divided by 2 2/3<br> Please answer and then explain.

mamaluj [8]

Hello,
If there is a methode for dividing mixed numbers, i would like to see it

For me, european, 3&1/4=13/4
2&2/3=8/3
(13/4)/(8/3)=13/4*3/8=39/32=1&7/32

3 0

3 years ago

When asked to factor the x^2-121 a student gives the answer (x-11)(x-11) what is wron with this answer?

Art [367]

Given expression is x² - 121

This is called Difference of Squared terms, we have a formula that is given as :-

a² - b² = (a - b) · (a + b)

Now using the above formula in the given expression, we get :-

x² - 121

x² - (11)²

here a = x and b = 11

x² - (11)² = (x - 11) · (x + 11)

but it says that student gave the answer as (x - 11) · (x - 11).

So, student's answer should be (x - 11) · (x + 11) instead of product of two (x - 11) terms.

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3 years ago

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A line’s equation is given in point-slope form:<br> y−6=(−23)(x+6)<br> This line’s slope is?

Nikolay [14]

The slope of the line is -23

<h3>How to determine the slope of the line?</h3>

The line’s equation is given in point-slope form:

y − 6 = (−23)(x + 6)

The line’s equation in point-slope is represented as:

y − y1 = m(x - x1)

Where

m represents the slope

By comparing y − y1 = m(x - x1) and y − 6 = (−23)(x + 6), we have

m = -23

Hence. the slope of the line is -23